A landlord owns 3 apartments, a 1-bedroom condo, a 2-bedroom condo, and a 3-bedroom condo. the rent that she receives each month for all three condos is $1,240. she needs to make repairs on all three of the condos. the repairs cost 10% of the 1-bedroom condo’s monthly rent, x, 20% of the 2-bedroom condo’s monthly rent, y, and 30% of the 3-bedroom condo’s monthly rent, z. the total repair bill for all three condos was $276. the 3-bedroom condo’s monthly rent is twice the 1-bedroom condo’s monthly rent. write a system of equations that can be used to determine the monthly rent for each condo.